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SUMMARY:MeV–PeV Frontiers: New Perspectives in Gamma-Ray Astronomy and P
 article Acceleration
DTSTART:20251216T000000Z
DTEND:20251218T090000Z
DTSTAMP:20261011T045900Z
UID:indico-event-472@indico.ipmu.jp
DESCRIPTION:Speakers: Tadayuki Takahashi (Univ. of Tokyo)\, Hidetoshi Kubo
  (UTokyo\, ICRR)\, Naomi Tsuji (UTokyo\, ICRR)\, Hiroki Yoneda (Kyoto Univ
 ersity)\n\nMeV–PeV Frontiers: New Perspectives in Gamma-Ray Astronomy a
 nd Particle Acceleration\nDate: 16-18 December 2025\nWorkshop venue: Kavli
  IPMU\, Lecture Hall\n\nRecent observations by extensive air shower (EAS) 
 arrays\, such as Tibet ASγ\, HAWC\, and LHAASO\, have ushered in a new er
 a of PeV gamma-ray astronomy. The discovery of PeV gamma-ray sources and i
 mproved measurements of the cosmic-ray energy spectrum at PeV energies are
  driving rapid progress in both observational and theoretical studies of p
 article acceleration.\nIn the era of multi-messenger astronomy\, new obser
 vational capabilities across the electromagnetic spectrum—from MeV with 
 upcoming missions such as COSI to PeV with EAS arrays—are opening unprec
 edented opportunities to probe particle acceleration sites and mechanisms 
 from complementary perspectives. One of the central questions in this cont
 ext is the origin of high-energy neutrinos and how they are related to the
  sources of cosmic rays. Understanding how these different gamma-ray energ
 y windows constrain the nature of cosmic accelerators and their connection
  to the high-energy neutrinos observed by facilities such as IceCube is es
 sential for advancing our understanding of particle acceleration in multi-
 messenger astronomy.\nThis workshop brings together experts spanning the M
 eV to PeV gamma-ray energy range and multi-messenger observations to foste
 r in-depth discussion on particle acceleration mechanisms. With a small nu
 mber of selected presentations and ample time reserved for discussion\, th
 e workshop aims to encourage cross-disciplinary discussion between observa
 tions\, theories\, and instruments. Through these discussions\, we seek to
  develop a new perspective on particle acceleration in high-energy astroph
 ysics.\nThis workshop will be held primarily in person\, as we wish to emp
 hasize the importance of face-to-face (F2F) discussions. The program will 
 be centered on invited talks\; however\, contributed talks will also be so
 licited. Please note that the number of slots for contributed presentation
 s is limited.\nKey topics include:\n\n\nWhat recent observations of TeV an
 d PeV gamma rays tell us about the diversity of cosmic-ray accelerators\, 
 such as newly found Galactic PeVatron sources\, and their connection (or l
 ack thereof) to high-energy neutrino sources\n\n\nThe role of upcoming obs
 ervations from MeV to PeV gamma rays in multi-messenger astronomy and oppo
 rtunities for synergy between COSI\, CTAO\, EAS arrays\, IceCube\, and fut
 ure missions\n\n\nTheoretical perspectives on particle acceleration and em
 ission mechanisms in multi-messenger astronomy\, including acceleration at
  shocks\, jets\, and outflows\, and hadronic versus leptonic processes\n\n
 \n \nInvited speakers with the talk titles:\n\nFelix Aharonian (MPIK) "Ga
 lactic Cosmic Ray Accelerators up to 1 PeV and beyond"\nChien-Ting Chen (N
 ASA/MSFC\; TBC)\nYoshiyuki Inoue (Osaka University) "Coronal magnetic acti
 vity in nearby Seyfert galaxies"\nKazumasa Kawata (ICRR/U of Tokyo) "Sub-P
 eV Gamma Rays Observed with Extensive Air Shower Arrays"\nDmitry Khangulya
 n (IHEP) "Discovering Galactic PeVatrons with LHAASO"\nShigeo Kimura (Toho
 ku University) "Galactic Stellar-mass Black Holes as Potential PeVatrons"\
 n\nAlex Kusenko (UCLA and Kavli IPMU) "A brighter future for TeV astronomy
 \, thanks to the secondary gamma rays and neutrinos"\n\nHerman Lee (Kyoto 
 University) "Bridging thermal and non-thermal phenomena in SNRs by 3D hydr
 o simulations and micro-calorimetric X-ray observations"\n\nEllis Owen (RI
 KEN/ABBL) "The Galactic Centre as a Multi-Messenger Laboratory: Prospects 
 for Astronomical Diagnostics and Cosmic-Ray Propagation Theory"\n\n\nJiro 
 Shimoda (ICRR/U of Tokyo) "Galactic Cosmic Rays and Diffuse Gamma-rays in 
 Baryon Cycle of Milky Way"\n\nThomas Siegert (Würzburg University) "The o
 nset of particle acceleration from MeV measurements"\nNaomi Tsuji (ICRR/U 
 of Tokyo) "Multiwavelength observations of PeVatrons"\nIevgen Vovk (ICRR/U
  of Tokyo) "Next-generation CTA observatory: status\, first results and fu
 ture exploration of the VHE sky"\nKoichiro Yasuda (UCLA) "Iron beacon in t
 he sky: Centaurus A gamma-ray emission from excitation and de-excitation o
 f heavy ions"\n\nHiroki Yoneda (Kyoto University) "Opening the MeV Window:
  From Today's Constraints through COSI and Beyond"\n\nShigeru Yoshida (Chi
 ba University) "Connections between high-energy neutrinos and MeV-energy p
 hotons: What will IceCube do once the MeV window opens?"\n\n \nImportant 
 Dates:\n\nRegistration deadline for the conference: November 28\, 2025\nRe
 gistration deadline for the contributed talks: November 19\, 2025\n\n \nS
 cientific Organizing Committee:\nKatsuki Asano\, Yoshiyuki Inoue\, Dmitry 
 Khangulyan\,  Hidetoshi Kubo\, Alex Kusenko\, Tadayuki Takahashi\, Naomi 
 Tsuji\, Hiroki Yoneda\nLocal Organizing Committee:\nKatsuki Asano\, Hideto
 shi Kubo\, Tadayuki Takahashi\, Naomi Tsuji\, Hiroki Yoneda\nThank you so 
 much to everyone who took part in the workshop!\n\n\nhttps://indico.ipmu.j
 p/event/472/
LOCATION:Lecture Hall (Kavli IPMU)
URL:https://indico.ipmu.jp/event/472/
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